Portion of a display screen with a graphical user interface



FIG. 1 is a front view of a portion of a display screen with a graphicaluser interface.

FIG. 2 is a second embodiment thereof.

FIG. 3 is a third embodiment thereof.

FIG. 4 is a fourth embodiment thereof.

FIG. 5 is a fifth embodiment thereof.

FIG. 6 is a sixth embodiment thereof.

FIG. 7 is a seventh embodiment thereof.

FIG. 8 is an eighth embodiment thereof.

FIG. 9 is a ninth embodiment thereof.

FIG. 10 is a tenth embodiment thereof.

FIG. 11 is an eleventh embodiment thereof.

FIG. 12 is a twelfth embodiment thereof.

FIG. 13 is a thirteenth embodiment thereof.

FIG. 14 is a fourteenth embodiment thereof.

FIG. 15 is a fifteenth embodiment thereof; and,

FIG. 16 is a sixteenth embodiment thereof.

The broken lines illustrating a portion of a display screen form no partof the claimed design.

CLAIM The ornamental design for a portion of a display screen with agraphical user interface, as shown and described.